Tokai Rubber Industries, Ltd.

Wintech Polymer Ltd.

Kazuhito Kasahara

Tomoki Inoue

Minoru Kawasaki

Kazutaka Katayama

Atsuo Miyajima

Kazushige Sakazaki

Koji Mizutani

Yasumitsu Miyamoto

A multilayer tube comprises at least the following three layers: an inner layer contactable with a fuel component, a barrier layer preventing the fuel component permeating, and an outermost layer. In the multilayer tube, the inner layer comprises a poly(butylene terephthalate) resin composition containing at least (A) a poly(butylene terephthalate) resin, the barrier layer comprises a polyester resin composition, and the outermost layer comprises a poly(butylene terephthalate) resin composition containing (A) a poly(butylene terephthalate) resin, (B) an elastomer component, (C) an aromatic polycarbodiimide compound, and (D) an antioxidant.

Multilayer tube

The connector clip for verifying complete connection integrally includes a clip body of U-shape in cross-section to receive a tubular holding portion and a connection verifying portion of U-shape in cross-section to receive an opposite axial side of an annular verification projection with respect to the pipe. The connection verifying portion has a verifying body and a snap-fit portion. The clip body and the verifying body are connected via a connection part, while the verifying body and the snap-fit portion are connected via a joint part. Reinforcement ribs are formed along an entire circumference of outer surface of the verifying body.

Connector clip for verifying complete connection between a connector and a pipe

The connector clip for verifying complete connection includes a connection verifying portion, more specifically, a pair of restraining portions having an assistance structure to certainly detect incomplete connection between the connector and the pipe. The assistance structure may be constructed so as to remove a sealing property between the connector and the pipe in incomplete connection relation with one another.

Connector clip for verifying complete connection between a connector and a pipe and connector connecting structure therefor

A connector cover for providing a water shield between a connector and a pipe comprises two cover elements. The cover elements are joined each other to construct a tubular water shield, which internally has a connector receiving portion on one axial side thereof for receiving a pipe inserting portion of a connector, and a pipe receiving portion on an opposite axial side thereof for receiving a pipe. The pipe receiving portion has a pipe receiving section on an opposite axial side thereof for receiving an opposite axial side from an annular projection of the pipe, and a projection receiving section on one axial side thereof for receiving annular projection. An inner diameter of the pipe receiving section is designed generally identical to an outer diameter of the pipe.

Connector cover for providing a water shield between a pipe and a connector

A connecting structure including a press-fitting body of a press-fitting member is press-fitted into one end of a resin tube to thereby form a diameter-enlarged end portion at one end of the resin tube and fixedly engage an axially-inner end portion of the diameter-enlarged end portion with inner circumferential surface of a base portion of a connection member . A sealing member is fitted into an annular outer circumferential groove formed in the outer circumference of the diameter-enlarged end portion. An end portion of a mating member is fitted onto or inserted into the diameter-enlarged end portion, so that the end portion engages the outer circumference of the sealing member in a fluid-tight condition. Upon insertion or fitting of the end portion of the mating member, a second engagement portion projecting radially outward from the outer circumferential surface of the end portion of the mating member engages arm portions of the connection member.

Connecting structure

A tube connecting structure for connecting a resin tube and a tubular mating member. The structure includes an engagement member having a cylindrical base that is attached onto the outer peripheral surface of an end portion of the resin tube and is fixed to the resin tube by a cylindrical press-fitted member. The cylindrical press-fitted member is press-fitted into the inner peripheral surface of the end portion, thereby expanding the diameter of the end portion of the resin tube and fixing the cylindrical base to the resin tube. The engagement member has a plurality of arm portions radially extending from the cylindrical base. First engagement portions, in the form of ratchets, are provided to protrude from tip end portions of the arm portions, such that the first engagement portions can be snap-engaged with a second engagement portion on the tubular mating member. The tubular mating member and the resin tube are directly connected to each other with a ring-shaped elastic seal member positioned therebetween.

Growing community of inventors

Aichi-ken, Japan

Kazuhito Kasahara